gistfile1.js

var bigArray = createBigArray(500000);
var maxPerTick = 200;
setTimeout(function notWow() {
    var n = maxPerTick;
    var el;
    var currIndex = bigArray.length;
    while (bigArray.length && n--) {
        el = bigArray[currIndex--];
        process(el);
    }
    bigArray.length = currIndex;
    setTimeout(notWow, 100);
});